[U-Boot] [PATCH v2 1/5] cmd: remoteproc: Add support for initializing devices individually

[Lokesh Vutla]

'rproc init' does the probe and initialization of all the available
remoteproc devices in the system. This doesn't allow the flexibility
to initialize the remote cores needed as per use case. In order
to provide flexibility, update 'rproc init' command to accept one
more parameter with rproc id which when passed initializes only
that specific core. If no id is passed, command will initializes
all the cores which is compatible with the existing behaviour.

Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>
---
 cmd/remoteproc.c | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/cmd/remoteproc.c b/cmd/remoteproc.c
index 81463f36b6..9702cf08f7 100644
--- a/cmd/remoteproc.c
+++ b/cmd/remoteproc.c
@@ -68,12 +68,22 @@ static int print_remoteproc_list(void)
 static int do_rproc_init(cmd_tbl_t *cmdtp, int flag, int argc,
 			 char *const argv[])
 {
+	int id;
+
 	if (rproc_is_initialized()) {
 		printf("\tRemote Processors are already initialized\n");
-	} else {
+		return CMD_RET_FAILURE;
+	}
+
+	if (argc == 1) {
 		if (!rproc_init())
 			return 0;
-		printf("Few Remote Processors failed to be initalized\n");
+		printf("Few Remote Processors failed to be initialized\n");
+	} else if (argc == 2) {
+		id = (int)simple_strtoul(argv[1], NULL, 10);
+		if (!rproc_dev_init(id))
+			return 0;
+		printf("Remote Processor %d failed to be initialized\n", id);
 	}
 
 	return CMD_RET_FAILURE;
@@ -130,11 +140,6 @@ static int do_remoteproc_load(cmd_tbl_t *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 	}
 
-	if (!rproc_is_initialized()) {
-		printf("\tRemote Processors are not initialized\n");
-		return CMD_RET_USAGE;
-	}
-
 	ret = rproc_load(id, addr, size);
 	printf("Load Remote Processor %d with data at addr=0x%08lx %lu bytes:%s\n",
 	       id, addr, size, ret ? " Failed!" : " Success!");
@@ -165,11 +170,6 @@ static int do_remoteproc_wrapper(cmd_tbl_t *cmdtp, int flag, int argc,
 
 	id = (int)simple_strtoul(argv[1], NULL, 10);
 
-	if (!rproc_is_initialized()) {
-		printf("\tRemote Processors are not initialized\n");
-		return CMD_RET_USAGE;
-	}
-
 	if (!strcmp(argv[0], "start")) {
 		ret = rproc_start(id);
 	} else if (!strcmp(argv[0], "stop")) {
@@ -203,8 +203,10 @@ static int do_remoteproc_wrapper(cmd_tbl_t *cmdtp, int flag, int argc,
 }
 
 static cmd_tbl_t cmd_remoteproc_sub[] = {
-	U_BOOT_CMD_MKENT(init, 0, 1, do_rproc_init,
-			 "Enumerate and initialize all processors", ""),
+	U_BOOT_CMD_MKENT(init, 1, 1, do_rproc_init,
+			 "Enumerate and initialize the remote processor(s)",
+			 "id - ID of the remote processor\n"
+			 "If id is not passed, initialize all the remote processors"),
 	U_BOOT_CMD_MKENT(list, 0, 1, do_remoteproc_list,
 			 "list remote processors", ""),
 	U_BOOT_CMD_MKENT(load, 5, 1, do_remoteproc_load,
@@ -270,7 +272,8 @@ U_BOOT_CMD(rproc, 5, 1, do_remoteproc,
 	   "\t\tNote: Services are dependent on the driver capability\n"
 	   "\t\t      'list' command shows the capability of each device\n"
 	   "\n\tSubcommands:\n"
-	   "\tinit   - Enumerate and initalize the remote processors\n"
+	   "\tinit <id> - Enumerate and initalize the remote processor.\n"
+	   "\t		  if id is not passed, initialize all the remote prcessors\n"
 	   "\tlist   - list available remote processors\n"
 	   "\tload <id> [addr] [size]- Load the remote processor with binary\n"
 	   "\t		  image stored at address [addr] in memory\n"
-- 
2.21.0